'Carnival Rides in Amsterdam' by Gary D. Paige
NIKON D800. Lens: Nikkor VR 16-35mm f/4G, here at 16mm
ISO: 100; 2sec @ f/22, comp=-0.7

Dam Square in Amsterdam Centrum contains a carnival of rides, food, etc. Night provides a black canvas for the rides to paint patterns over time. Experimenting with time and timing results in a variety of effects. Here, one ride is still, another moving slowly, and another (right upper corner) quite fast. It is impossible to choose a favorite, however.